Ventilating device



P 1960 G. M. BREIDERT 2,933,036

VENTILATING DEVICE Filed Nov. 3, 1958 INVENTOR. George M. Breidert Attorneys United States Patent VENTILATING DEVICE George M. Breidert, Granada Hills, Calit, assignor to The G. C. Breidert Co., San Fernando, Califi, a California corporation Application November 3, 1958, Serial No. 771,479

1 Claim. (Cl. 98-43) This invention has to do with roof ventilators and relates more particularly to roof ventilators which are constructed to function either to exhaust air from a building by virtue of extraneous air currents creating reduced pressure in the discharge portion of the ventilator, or which is capable of functioning in said manner as well as by the use of a booster fan or blower inside the ventilator.

Ventilator devices of this character usually have a base portion which is mounted atop the roof, so that they extend a considerable distance above the roof, which renders them more susceptible to being damaged or displaced by extremely high winds.

It is therefore an object of the present invention to provide a roof ventilator which has novel means for mounting it in a way to suspend its lower portion in an opening in the roof and for rendering the interior of the device readily accessible for repair or replacement of parts.

Other objects and advantages will become apparent to those skilled in this art from the ensuing detailed description wherein, by reference to the accompanying drawings, I describe the best mode which I have thus far devised for carrying my invention into practice. I wish it understood, however, that I do not necessarily restrict my invention to the details to be described, since other arrangements and combinations of parts are possible within the broader aspects of the invention as defined by the accompanying claim.

In the drawing:

Fig. l is a medial vertical section; and

Fig. 2 is a cross section taken on line 2-2 of Fig. 1.

Referring now to the drawing, the numeral 5 generally designates my ventilator device, the lower portion of which is suspended through an opening 7 provided in a building roof 10.

The ventilator device comprises a cylindrical base portion 15 having an orifice ring 17 in its open bottom end, said ring being curved in cross section and defining the inlet of the device.

The top end of the base portion 15 has a peripheral flange 20 which flange is shaped so that, together with the contiguous portion of the base, it defines a downwardly opening annular channel 22 to receive an annular supporting curb 23 which is carried by and suitably secured to the roof around the opening 7.

The head or upper portion of the ventilator device comprises a neck portion 25 which flares at 26 to a horizontal annular portion 27, the latter portion terminating in a downwardly disposed annular flange 29 surrounding the outer wall 20a of the flange 20; the horizontal portion 27 resting upon the horizontal portion 20b of the flange 20.

To cause extraneous air currents blowing around the ventilator head to create a reduced pressure in the neck 25, I provide a plurality, here shown as four in number,

of baflie members 35a-d. Each of the baffle members 35a-c has an annular, horizontal outer portion 37, an

2,933,036 Patented Apr. 19, 1960 inclining or frusto-conical medial portion 38, and an outwardly and upwardly disposed annular inner flange portion 39. The topmost baflle 35d also has like portions 37 and 38.

To retain the bottom bafile 35a in place, I form the top end portion 40 of the neck into a V-section as shown at 41, into which the intersecting portions of the parts 38 and 39 of baflle 35a resiliently engage. A flat cover wall 42, formed integral with the topmost baffle 35d, is supported from the neck by circumferentially spaced brackets 45 Whose lower end portions are secured, as by welding, to the neck 25, and whose top end portions are secured, as by welding, to the inside surface of the cover wall 42. Those brackets 45 have longitudinally spaced V-shaped portions 45a to receive the intersecting parts of portions 38, 39 of the baffles 35b and 35s, to retain said baffles in vertically spaced relation to each other as well as to the bafiies 35a, 35d.

Within the base, I provide a motor mount 50 having an angle iron portion 52 supported upon brackets 54 secured to the inner surface of the base, as by welding, by means of rubber feet 55, to dampen vibrations caused by operation of the motor M. The mount 50 has a portion 57 embracing and retaining the electric motor M whose shaft 58 carries a fan 59 within the orifice ring.

To enable the head portion of the ventilator to be swung into and out of position overlying the base in order to provide access to the motor, I provide a hinge 60 secured to the flanged portions 20a and 29.

The base portion 15 of the ventilator is sufiiciently larger in inner cross sectional area than the neck 25 to compensate for the space occupied by the motor and motor mounting means.

In operation, extraneous air currents blowing around the bafiies 35a-d create reduced pressure in the neck to cause smoke or foul air to be exhausted from the building. When atmospheric conditions are such that there are insufficient extraneous air currents or where the exhaust load is too great, the booster fan 59 may be operated.

As will be observed, a substantial portion of the length of the ventilator is suspended through the opening 7 and yet, by virtue of the described construction, the upper exposed portion of the ventilator may be swung about hinge 60 into position rendering the interior of the ventilator accessible.

I claim:

In a ventilator for a building roof having an opening therethrough defined by a curb, a tubular base portion of round cross section having in its bottom end an annular member defining an inlet orifice ring coaxial with said base portion and having an annular, radially disposed flange at its top end for engagement with the top surface of said curb, said flange having an annular downwardly extending peripheral portion surrounding said curb a motor mounting bracket attached to the inner surface of said base portion and projecting transversely thereof, a motor supported by said bracket within and coaxial with said base portion, an air impeller, said motor having a shaft operatively connected to and supporting said impeller in and coaxial with said orifice ring, a neck member of round cross section having an annular bottom end flange detachably resting upon said first mentioned flange in overlapping, parallel relationship thereto, means hingedly securing together the lower end portions of said flanges whereby to permit swinging movement of said neck member relative to said base portion, said neck member tapering from said annular bottom end flange to an upper cylindrical portion of" relatively reduced diameter; a top portiorr having annular l'ouvers and an overlying, imperforate top wall and circumferentially spaced upright strips carried by saidneckmem:

said neck member and below. said.topflwallsv I References-Cited in the'file -of this patent- UNIT EIT ST ZLTES- PATENT S Spea'r June 9, Gerlitz Feb. 9, Doherty Apr. 22, Knutson Jan. 13,

FOREIGN" PATENTS Germany" Sept. 30, 

